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CompTIA Data+ Exam Certification Details:
| Exam Code | DA0-001 |
| Exam Name | CompTIA Data+ |
| Books / Training | CompTIA Data+ Certification Training |
| Duration | 90 mins |
| Exam Price | $239 (USD) |
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So far we have covered many topics related to CompTIA A+ exams. But now let's talk about the preparation process for CompTIA A+ exams.
Most people go through a lot of pain trying to prepare for CompTIA A+ exams. So they spend a lot of time studying for these exams, but unfortunately, they still fail. The reason why they fail is because they are simply not prepared enough to pass the exam.
If you think that preparing for exams is a piece of cake, then you are wrong. Preparation for exams is not a quick fix. Preparing for exams is like learning a new language. You need to devote a significant amount of time and effort to study for it. CompTIA DA0-001 exam dumps are designed to make your life easier.
CompTIA A+ exams have different levels. The easiest ones require just 8 hours of preparation, while the hardest ones require 40 hours of preparation. In this article, I'm going to explain the preparation process for the CompTIA DA0-001 Exam.
NEW QUESTION 24
What term is used to describe an interactive visualization that encourages people to explore data dynamically?
- A. Data point.
- B. Data set.
- C. Graphical representation.
- D. Dashboard.
Answer: D
Explanation:
A dashboard is a visual display of all of your data. While it can be used in all kinds of different ways, its primary intention is to provide information at-a-glance, such as KPIs. A dashboard usually sits on its own page and receives information from a linked database.
NEW QUESTION 25
Which one of the following is not a good example of discrete data type?
- A. Years of experience.
- B. Temperature of a room.
- C. Attendees at a meeting.
- D. Number of children.
Answer: B
NEW QUESTION 26
You have two databases tables that you would like to join together using a foreign key relationship.
What term best describes this action?
- A. Mixing.
- B. Merging.
- C. Blending.
- D. Appending.
Answer: B
Explanation:
Data merging is the process of combining two or more data sets into a single data set. Most often, this process is necessary when you have raw data stored in multiple files, worksheets, or data tables, that you want to analyze all in one go.
NEW QUESTION 27
Five dogs have the following heights in millimeters:
300, 430, 170, 470, 600
Which of the following is the mean height for the five dogs?
- A. 493mm
- B. 504mm
- C. 405mm
- D. 394mm
Answer: D
NEW QUESTION 28
What would be an example of an acceptable form of primary identification for the Data+ exam?
- A. Employee ID card.
- B. School ID card.
- C. Passport.
- D. Credit card with photo and signature.
Answer: C
NEW QUESTION 29
What is an example of data in transit?
- A. Data on a network.
- B. Data on a smartphone.
- C. Data on a hard disk.
- D. Data in memory on a computer.
Answer: A
Explanation:
A data network is a system designed to transfer data from one network access point to one other or more network access points via data switching, transmission lines, and system controls. Data networks consist of communication systems such as circuit switches, leased lines, and packet switching networks.
NEW QUESTION 30
Chris is building a database to store prices for items on a restaurant menu.
What data type is most appropriate for this field?
- A. Numeric.
- B. Tags.
- C. Alphanumeric.
- D. Date.
Answer: A
Explanation:
Prices are numbers stored in dollars and cents; as such, the data type needs to be capable of storing numbers.
NEW QUESTION 31
Data stewards protect the organization from legal violations that may result in costly fines and negative publicity.
- A. True.
- B. False.
Answer: A
NEW QUESTION 32
Andy is a pricing analyst for a retailer. Using a hypothesis test, he wants to assess whether people who receive electronic coupons spend more on average.
What should Andy's null hypothesis be?
- A. People who receive electronic coupons do not spend more on average.
- B. People who receive electronic coupons spend less on average.
- C. People who receive electronic coupons spend more on average.
- D. People who do not receive electronic coupons spend more on average.
Answer: A
Explanation:
The null hypothesis presumes the status quo. Andy is testing whether or not people who receive an electronic coupon spend more on average, so, the null hypothesis states that people who receive the coupon do spend more on average.
NEW QUESTION 33
Analyzing a data point, you find that the point is 1 standard deviation above the mean.
What is the z-score for this data point?
- A. 0.5
- B. 0
- C. 1
- D. -0.5
Answer: B
NEW QUESTION 34
What symbol is used for the variance of a population of data?
- A. 0
- B. 2x2
- C. s
- D. 0x2
Answer: D
Explanation:
The sample variance is defined by(15.59)We use the symbol sx2 for a sample variance and the symbol ox2 for a population variance.
NEW QUESTION 35
How should data classifications be assigned?
- A. According to criticality.
- B. According to sensitivity.
- C. According to sensitivity and criticality.
- D. According to sensitivity, criticality and age.
Answer: C
NEW QUESTION 36
Which one of the following R values shows strongest positive correlation between two variables?
- A. 0
- B. -0.4
- C. 0.9
- D. 1.6
Answer: C
NEW QUESTION 37
Which one of the following would not normally be considered a summary statistic?
- A. Mean.
- B. Standard deviation.
- C. Variance.
- D. z-score.
Answer: D
Explanation:
Simply put, a z-score (also called a standard score) gives you an idea of how far from the mean a data point is. But more technically it's a measure of how many standard deviations below or above the population mean a raw score is. A z-score can be placed on a normal distribution curve.
NEW QUESTION 38
Which of the following is an example of a discrete data type?
- A. 5 kids
- B. 2.5mi (4km)
- C. 10.7lbs (4.9kg)
- D. 8in (20cm)
Answer: A
NEW QUESTION 39
You have a database where queries are performing slowly.
Investigating the results, you find that the database is performing a time-consuming table scan.
What action can best improve the query performance?
- A. Adding an index.
- B. Sub setting the records.
- C. Parameterizing the query.
- D. Recompiling the query.
Answer: A
Explanation:
You create an index to optimize performance when searching the table using the Find function and to establish uniqueness of table columns.
Indexing makes columns faster to query by creating pointers to where data is stored within a database. Imagine you want to find a piece of information that is within a large database. To get this information out of the database the computer will look through every row until it finds it.
NEW QUESTION 40
Which of the following contains alphanumeric values?
- A. 13.6
- B. 10.1E
- C. A3J7
- D. 0
Answer: C
NEW QUESTION 41
What's the minimum passing score on the Data+ exam?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 42
Analyze the values of X shown below
(2,2,5,6,7)
What is the modal value?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 43
Jhon is working on an ELT process that sources data from six different source systems.
Looking at the source data, he finds that data about the sample people exists in two of six systems.
What does he have to make sure he checks for in his ELT process?
Choose the best answer.
- A. Duplicate Data.
- B. Invalid Data.
- C. Redundant Data.
- D. Missing Data.
Answer: B
Explanation:
Duplicate Data.
While invalid, redundant, or missing data are all valid concerns, data about people exists in two of the six systems. As such, Jhon needs to account for duplicate data issues.
NEW QUESTION 44
What is NOT a characteristic of a good data steward?
- A. Influential.
- B. A good technology expert.
- C. Collaborative.
- D. A subject matter expert.
Answer: B
Explanation:
Provide the technical expertise around source systems, extract, transform, and load (ETL) processes, data stores, data warehouses, and Business intelligence tools.
NEW QUESTION 45
Which dimension of data quality ensures that data stored in multiple locations is the same?
- A. Accuracy.
- B. Validity.
- C. Completeness.
- D. Consistency.
Answer: D
Explanation:
Data consistency means that each user sees a consistent view of the data, including visible changes made by the user's own transactions and transactions of other users.
NEW QUESTION 46
Daniel is using the structured Query language to work with data stored in relational database.
He would like to add several new rows to a database table.
What command should he use?
- A. INSERT.
- B. SELECT.
- C. ALTER.
- D. UPDATE.
Answer: A
Explanation:
INSERT
The INSERT command is used to add new records to a database table.
The SELECT command is used to retrieve information from a database. It's the most commonly used command in SQL because it is used to pose queries to the database and retrieve the data that you're interested in working with.
The UPDATE command is used to modify rows in the database.
The CREATE command is used to create a new table within your database or a new database on your server.
NEW QUESTION 47
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